Corn sheller



June 14, 1938. A. B. DIETERlcH y 2,120,641

CORN SHELLER Filed June 16, 1933 2 Sheets-Sheet l A T T ORNE YS.

June 14, 1938. A. B. DIETERICH. 2,120,641

- CORN sHELLER Filed June 1e, 1935 v 2 sheets-swamI 2 Patented June 14, 1938 APAT ENT OFFl CE CORN SHELLER Arthurl B. Dieterich, East Moline, "IIL, assignor to 'Deere& Company, Moline, Ill., a corporation of Illinois Applicationjune 16, 1933, SerialNo. 676,055

16 Claims.

of animproved pneumatic cob stacker for dis,

jposing of the cobs from which the corn hasbeen shelled.'

One of the principal objects of the present in Vvention is the provision of an improved pneuA matic cob stacker which consists of a fan adapted to create a blast of air and means for deliver- -``-ingcobs into the blast of air coming from said ffan. According to the present invention, the cobs do not Ago through the fan but are delivered `to'the airr blast ahead of the fan. Another vobject of the present invention is the provision of a pneumatic cob stacker which com- "prises a fan and means for delivering the cobs 4to-the air lblast therefrom yand which, in addition, includes means for preventing the cobs from dropping back into the fan in the event Athat 'the air blasttherefrom-is temporarily not sufficient to discharge the cobs.

In the cob stackers heretofore provided for disposing of cobs with which I am familiar, the cobs'have been'fed into theblower itself, and

-`= 'for this reason have not provenv satisfactory. 1Due to the cobs coming into direct contact with ^theblower parts, the `latter are subjected at Ytimes toV terrific stresses. Ofttimes, also, foreign vmaterial, such as rocks, Abolts and the like pass lalong vwith the cobs, and vwhen such foreign matlter is--directed into the blower it invariably dam- 'l ages the blower parts. According to the present invention,` the cobs vare not directed into the blower itself but instead are deposited in the *ypath of the-exhaust air ahead of the blower fan, as mentioned above. Thus, the cobs never come f" into contact Vwith the blower parts.

Stillfurther, another object of the present inventionris Ithe provision of improved ymeans *4U-for ffeeding the cobs into the blast of Vair from thestacker fan. According to the vpresent inwention, the cobs from the cob shoe ofy the sheller *fare 'delivered to theI air blast by means of a d rotaryffeeder vwhich regulates the volume of cobs mm'going'into the blower, such rotary feeder serving as a positive displacementfeeding devicel which prevents overloading. Preferably, the rotary -feederlls geared directly to the'fan sothat one -always- `revolves vproportionately to the other.

Still further; another object of the present in- #ventionis thejprovision of al stacker having a -rotary cob feeder which functions, not only to lfeed cobs-into the path of airfrom the blower 'fan,'rb'ut also maintains the port through which 1555 the-cobs -aref-fed-closed at all times to prevent the escape of air through the opening ythrough which the cobs aredirected. Leakage of air, at this point in any substantial quantity would materially detract from the eciency of the cobI .r blower.

Still further, an additional object of the present inventionincidental to the featuresmen'- tioned above is the. provision of means preventing foreign material, suchas rocks, bolts andy other objects which are too heavy to be, carried upwardly with the cobs, from passing rearwardly or backwardly into the blower fanY itself. vMore specifically, it is the purpose of the present invention to provide screen means or the equiva. lent which serves to keep heavy objects, suchas those mentioned above, out of the fan, but -which forms no appreciable obstruction for the passage of air therethrough so that the air blastis` not disturbedfcr otherwise interfered with. vPreferably, the screen means provided is in the form 20 of a series of longitudinally positioned fins spaced close enough together to prevent such foreign matter from passing therebetween but which vforms no appreciable obstruction for the passage of the air blast therebetween. Y 5

A further object of the present invention comprises forming the screen means above referred to so as to allow silks, huskswand other like material, which are occasionally drawn into the intake of the blower fan, to escape through the" exhaust duct with the air blast. Thus, the screen means vwhich effectively prevents the cobsand other objects from falling backwardly into the fan also serves to permit the escape of Silks, lhusks and the like with the air blast. d

Another object of the present invention contemplates the provision of means causingithe stacker fan to draw air from out the rear end of the sheller. Usually,`corn shellers are proy vided `with a blast fan `for creating a draft 4 through the sheller casing or housing so as to separate the dust from the corn dropping through the reciprocating shoe. Generally, this dust ladenair blows out the rear end of the sheller and makes operation around the rear end of the machine disagreeable. According to thepresent invention, the fan of the cob blower is arranged to draw in thisvdust laden air so that the latter is blown out the end of the cob chute or conduit away from the machine. This is an important feature of the present invention and makes Work- -ing around the machine much more pleasant.

These and other objects of the present invention will be apparent to those skilled in theart after a consideration of the followingdetailed55 construction in which the principles of the present invention have preferably been embodied, taken in conjunction with the accompanying drawings illustrating the preferred construction.

In the drawings:

Figure 1 is a side elevation of a sheller embodying the principles of the present invention;

Figure 2 is a longitudinal vertical section taken through the cob blower and associated structure; and f Figure 3 is a section taken along the line 3-3 of Figure 2.

Referring now more particularly to Figure 1, the Sheller shown is, in many respects, of the conventional type, and hence it is deemed unnecessary to show in detail all of the operating mechanisms of the sheller. Generally speaking, the Sheller consists of a frame it! supported on front and rear wheels Il and I2 and consisting of a plurality of longitudinal bars i3 and vertical bars l5. At the rear end of the machine a swinging ear corn feeder 20 is provided and which delivers thD corn to a feed hopper 2l from which the corn is directed to a shelling device 22 mounted on the rear of the frame i6 of the sheller. The shelled corn from` the shelling device 22 is deposited onto the rear end of a vibrating or reciprocating shoe 24 while the cobs are deposited on the front portion, this portion of the shoe 2&3 being indicated in Figure 1 by the reference numeral 24a. The cob shoe 24 conveys the cobs forwardly of the machine by the reciprocating movement of the shoe, while the shelled corn drops through the shoe 2@ onto a cleaning shoe 25.. A blast fan 26 directs a blast of air along the cleaning shoe 25 and underneath the cob sho-e 24 to remove dust, dirt and the like from the shelled corn, the latter dropping through the cleaning shoe 25 and finally reaching the grain elevator 21.

The husks, silks and other like materials are removed from the cobs on the cob shoe 24 by means of a. suction fan 39 disposed at the front end of the Sheller and supported on the sheller frame lil by suitable brackets 3l or the equivalent. AThe suction fan 3i! includes-an intake duct 32, see Figure 2, by which the air is drawn from within the casing or housing of the Sheller into the fan 3B and discharged through the outlet conduit 34.

The reciprocation of the cob-shoe 24 serves to conduct the cobs out of the front end of the Sheller, the sheller casing including an opening d0. The cobs are conducted through thev opening 40 into a chute 4| which is pivotally connected at 42 to the front end of the shoe 24 and is supported for rocking movement by a pair of links i3 pivotally connected, as at d4, with the front end of the chute 4l and to the frame l0 of the Sheller, as at 451. The chute 4l includes two side walls 45 which telescope with plates 41 iixed to the sides of the Sheller housing in spaced relation thereto, as best shown in Figure 2, the bottom wall is stepped, as at'da, for a reason that will appear later. In order to prevent the cobs from passing out of the Sheller too quickly, a cob dam 43 is provided at the front end of `the cob shoe 24.

'I'he cob blower fan is indicated in its entirety by the reference numeral and includes a casing 5l suitably fixed to and supported by the Sheller frame l5 at the front end thereof, as best indicated in Figure l. A fan shaft is journaled for rotation within the casing 5I and is provided with a series of vanes 56 mounted therevspace between the curved wallsi andTZ.

closing off of this space by the vanes 80 serves on. A pulley 51 is also mounted on the shaft 55 and receives a belt 58 which drives the fan 50 and which, in turn, is driven from the exhaust fan 3D, as indicated in Figure 1. v

Air is taken into the fan casing 5l through openings 553, which will be referred to later, and the air blast is delivered through anv exhaust port 6I which leads into an exhaust duct S2. The side walls of the exhaust duct or conduit 52 are extended generally upwardly, as indicated at 55, so as to be disposed in telescoping relation with the "sides 46 of the chute di, as indicated at E55 in Figure 2.

The upper side of the exhaust duct :32 is provided with an opening lil, and adjacent this opening the side walls 55 are joined by arcuate walls 1I and 'i2 to form the casing of a rotary cob feeder, indicated inritsentirety by the reference numeral 'I5 in Figure 2. The rotating feeder 'l5 comprises a five sided drum Vl mounted on a Shaft '1S and to which five radially extending flexible vanes 8D are fixed. The vanes 80 are of sumcient length to substantially close off the The to prevent any of the air blast from passing outwardly of the exhaust duct 62 through the cob feeder i5. It is to be noted that the degree of arc of the curved walls 12 is greaterthan the angle between adjacent vanes 8l). As a result of this construction, the space between the curved walls 'Il and i2 is maintained closed at all times.V

The cob feeder 'l5 is arranged adjacent the forward or discharge end of the cob chute 4I so as to receive the cobs therefrom as the same are .'v

deposited therein by the reciprocation of the cob shoe 24. As the feeder l5 revolves, it feeds cobs from the chute 4I directly into the stream of exhaust air from` the blower 5G in front-of the exhaust port 5| thereof. The blast of air through the exhaust port 6I carries the cobs outwardly through the conduit 62 and through the discharge ypipe 62a, which may be made adjustable as indicated in Figure 1. To this end, the portion of lthe conduit 4520.` is made flexible and may be regulated by control mechanism 9i) which includes a hand wheel 9| and a second hand Wheel (not shown) controlling the lateral position and the Vertical elevation of the discharge pipe. The swivel elbow 62a and the other associated parts, including the adjusting mechanism 90 just referred to, permits delivering the cobs at any angle within a half circle and at a substantial distance from the machine. Y

It is to be noted that the construction of the cob feeder 'l5 is such that, not only is leakage of the air blast from the fan 50 through the feeder prevented but also the vaned feeder wheel is such that measured or metered quantities of cobs Yare positively delivered into the air blast stream at a given rate, dependent upon the rate of rotation of the blast fan itself. The vaned feeder drum or wheel 'l5 therefore positively acts t0 prevent overloading of the cob blower, no matter how many cobs are ejected from the cob shoe 24, and the stepped formation 44aof'the bottom of the chute'dl insures that each section of the vaned cob feeder 15 will be lled and will deliver the right amount of cobs into the exhaust stream from the cob blower 50. The cob'feeder shaft 18 is supported by bearings 92 secured by U-bolts 93 to diagonal frame members 94 connected with the vertical and horizontal bars of frame l0. The shaft 'I8 carries a pulley 95 fixed to the end thereof and driven by a belt 9'! trained over a pulley Z.-98 on;tlf1e=-end of thepfan shaftz55 .oppositethe pulleyfl sofas-to'beidriven with .the Dblastffan'v fatrproportionate speed.

In zthe preferred construction `illustrated p in ,1; vligurel'the discharge port El for the air blast leads upwardlytandY forwardly. with Drespectn to` the sheller, and hence ssome means `is lnecessary to prevent'the cobs, from fallingyintoz the fan l5|). If the. cobs should drop-back into thezfan; the latter 10 might be'damaged because of the,.stresses :involved in the :direct impact .withV the J cobs or other objects. In order, therefore, I-to :prevent foreign :matter fromadropping Abackthrough the exhaust port 6| into the blower fan housing 5|, screen 15 :means H00 :is provided. Preferably, the `:screen 1-means-I |200 comprises .alseries-ofyfins |0| extending acrossftheexhaust4 port-.5| and'spaced close -enough togetherv to prevent cobsforeignmatter, -andzthelike from passing down between them. The uns. MH-areformedof pieces-of sheet'metal ror :other material bent toa U-shape, whereby eachpiece forms two'iins connected byfa base :portion |02. Also, the bases-,|:02form means for Vfixing the nsto the bottom wall of the exhaust duct. lor-cleaningout the Yduetto remove any :foreign matter which will;not.blow out with the texhaustair, -a sliding door |03 iszprovided. As best shown in Figure 2, the-door |03 isgmounted radjacent the cob feeder 15 :and just-ahead ofthe screen |00.

fOccasionally silks, cornyhusks and other materials-are-drawn in through the intake of' the fanv50, and if the screen |00 extended entirely -`across-.theexhaust-port 6| in a vertical direction, the husks, silks and the: like -wouldsoon bank up `.z igainst the screen and materially reduce the efriiciency of the blast. yIn order'torprovide` for the ,esoape-of silks, husks and the likegthens'llll :terminate within a short `distance fronrthe top A0 wa1lf|05 of the exhaust'duct 62. This construction vprovides aV narrow unrestricted opening |06 aat this point, and to'faci-litatethe 'discharge'of silks, husks and the likeythe rear edges'of the fins are inclined upwardly from the base,A as shown :.45 at H0. This construction -or configuration of the ns, together withl the unrestricted opening -J |06,- provides .a means for :allowing the escape lof .-.silks and huskswhich may have 'been taken into they fan through the intakezports thereof.

m5()M'T'he silks'and'husks will slide up the inclined portions ||0 and out through-the opening |06 zand' be dischargedwith fthe `cobsecoming from y the cob feeder l5.

As mentioned above, the blast fan 26-at the rear end of the sheller creates adraftA of airalong vthe shoes 24 and 25. Some ofthis air-.passes through thev shoes andhisfdrawm ytogether .with most of. the Silks, husks and the like, through the intake port 32 oftheiexhaust fanf30 attheifront eendof. the-sheller. fI-Iowever,faconsiderable porf tion "of the blast Ifrom `the lfan 26 A:passes l out through the front. end of the machine @below the cob shoelf24 through anv opening ||.-5. lThis airis vladen vwith dirteand dust, and if.,allowed.to-blow -65l out vofthe-front end ofzthe'machine, this endof vthe machine willbe quitewdusty, making it disagreeableiorA the :operator when regulating v the l,cob pipe fi2arloyY the controlmechanism f90. I-n order that this dust `and dirtrfromi'thefront end 70 ofv the machine may` be conductedfaway from` the machine, a pairof shields |20.\and.l2|vare provided around the intake ports off the blowerf50. `Phe-shields.- 20 1 l and |.2 .are substantially i semicylindrical in formation and are fixed tothe'fan 75 .housinge5 around theA lower half of Y the intake .openings F60. The lshields extend foutwardlyand a upwardly 'eandfat their'rear edges` are f connected vwithithe-:shellerf frame r |0, .as indicated: in `Figure l3 rby `the reference numeral |23. `Eorthis "pur- :iposettheushieldsxare-provided with extensions..y |25. a5 ,'Aipair of'tdeiiectingshields |30 and |3| are Aalso vprovided, these fshields'bei-ng `fixed to the sides iof thefchuteAI. The shieldsl'20, |2|,t|'30 and V|3| cause ithe fblowerfani-50to include in'its rintakezsubstantially all7 of theldustl laden air comall) ing i'from' the :endfof the machine to the iopening :H5 therein.

The operationof the machinev described is be- `lievedto` be .apparent and is substantially asf folflows. M5

Corniis delivered to the rshellingmechanisrn22 :through: the: feeder.2|',l,I as somewhat more clearly disclosed inthecopending application of Leonard iB. "Neighbour, Serial YI\To.\6'74',603, yi-lled June 7,

1933. The operating-*mechanism for the feederiZO :,andshellingmechanism is also operative to reciprocatetheshoes 24 and'25 and toalso'drive theiblast fan 26 -which cleans the'grain'and' the exhaustifan-ll which :draws'out the silks, husks andthe like. The reciprocation of thev cob shoe125 f24 servesto eject the cobs into the chute 4| by )which the cobs:are'delivered to the lower vanes -of 'thef revolving cob feeder 15. This feeder thus Aserves to deliver predetermined and controlled Yamounts-of cobsinto thepath of the air blast $80 fromthe'cob blower 50,`therotation of the cob ,feeder "15 xalso serving the vusefulI purpose of creatingV a backward draft in the direction of the arrow in 1Figure..2,'for the rotation ofthe upper 'vanes 80, which `are not filled lwith cobs Yas`are E35 'the lower Vanescarriesairf fromthe exhaust duct F-62 toward the chute 4|, it being this air which itends to blow back any husks'which might other- 'wise be carried over into the chute 4| `with the i cobs. 'The draft' from the cob feeder-151 keeps the 5140 -husks and the like from coming out the opening *.40 and idirects them into the path'of the air l'currents produced by the suction fan 30. `The cob blower50 draws in air through intakes 60 .at opposite sides of the casing5l, and they shields s45 |20 and|2| `carried by the casing 5| andthe -shields`|30 yandv |31 carried by the chute 4| serve tocausevthe incoming currents of air to include the-air blowing out of the sheller through the opening. |r5'at the front end of the machine.

'While I `have Vdescribed-.above 4the preferred construction `in which the principles of the present invention have been'embodied, it is tobe :understood that my invention is not tobe limited Ato the specic'details shown and described above, s55

but that, in fact, ywidely different means may be Lemployed in the practice of thebroader `aspects of .lf-my invention.

`What. I claim,r therefore, and desire` to secure :by: Letters Patent is:

l. AA vcob stacker x comprising a Ablower having cob receivingmeans,and air intake ports at both sides of the'blower, conveying means including a `'reciprocatoryV shoe adapted-to receive cobs, husks andthelike, meansfor creating a blast of air 155 laround said shoe to prevent'husksand-the like from being/delivered" to the stackena'chute eX- tending from the end of said shoe to receive cobs rtherefrom'rand conduct them towards said blower,

and means including a shield eXtending'laterallytO yfrom each side'lof said chute, and a shield around Uthe vlower portionof-each of said intake ports and extending upwardly to causeA said cob blower Vltodraw in the dust ladenfair coming from the vicinity of said shoe. '75

2. A cob stacking mechanism comprising a cob blower having air intake ports at the sides and an exhaust port, cob conveying means including a reciprocatory shoe operating to deliver cobs toward said blower, a chute having a closed bottom extending'from the end of said shoe to receive the cobs therefrom, a rotating cob feeder for receiving the cobs from said chute and for conducting .them into said exhaust port, said feeder having flexible vanes rotatable about a generally transverse axis, the lower vanes serving to feed cobs into said exhaust port and Vthe uppervanes causing a draft over the top of said chute to blow husks coming over with the cobs back toward said reciprocatory shoe, and means including a shield extending laterally from each side of said chute and a shield around the lower portion of each of said intake ports to cause said cob blower to draw in the dust laden air coming from the vicinity of said shoe.

3. A cob stacker comprising a casing, a fan disposed in said casing, means serving as an exhaust duct leading from said casing, there being an opening in said exhaust duct, a cob feeder disposed adjacent .said opening and carried by said duct for delivering material into the path of the air blast from said fan, reciprocatory cob conveying means for conveying cobs toward said feeder, a cob dam carried adjacent the discharge end of said conveying means, and means connected to be operated by said reciprocatory conveying means and including a stepped positively acting cob feeding member for delivering cobs from said'conveying means to said feeder.

4. A cob stacker comprising a blower having cob receiving means and an air intake port, cob conveying means including a reciprocatory cob shoe, a chute extending from the end of said shoe to receive cobs Ytherefrom and to conduct them to said blower, and means serving as a shield disposed adjacent the discharge end of 'said cob shoe on the exterior of said stacker for directing the dust laden air in the vicinity of said end of the shoe to the air intakeof said cob blower.

5. A ccb stacker comprising a blower having cob receiving means and air intake ports at both sides 'of the blower, conveying means including a reciprocatory shoe adapted to receive cobs, husks and the like, means for creating a blast of air around said shoe to prevent husks'and the like from being delivered to the cob receiving means with the cobs, and shield means extending laterally outwardly with respect to said intake ports and disposed at the end of said reciprocatory shoe so as to draw in the dust laden air coming from the discharge end or said shoe.

6. A cob stacker comprising av blower havin cob receiving means and air intake ports at both sides of the blower, conveying means including a reciprocatory shoe adapted to receive cobs, husks and the like, said blower being located below and outwardly of the discharge end of said reciprocatory shoe so as to draw in air from outside the stacker, and a shield arranged around the lower portion of each of said intake ports belowand outwardly of the discharge end of said reciprocatory shoe and extending upwardly so that a portion of the air drawn in by said blower includes dust laden air coming from the discharge end of said shoe.

'7. A cob stacker comprising aA centrally disposed blower having cob receiving means and laterally spaced intake ports at both sides of the blower laterally outwardly of said cob receiving means, conveying means including a reciprocatory shoe adapted to receive cobs, husks and the like, means separate from said blower for creating a blast of air around the discharge end of` said shoe and directed inwardly with respect thereto so as to prevent husks and the like from being delivered to the cob receiving means with the cobs, and-means including a shield extending laterally outwardly from each side of and around the lower portion of each of said intake ports and extending upwardly with respect thereto toward the discharge end of said reciprocatory shoe so as to cause said cob blower to draw in dust laden air from the discharge end of said shoe.

8. In a stacker, the combination of a cob blower comprising afan having an intake port and a generally upwardly disposed exhaust conduit, said conduit having anropening at one side thereof, a cob feeder includingV an arcuate housing discharging into said opening and a member having vanes with flexible sections closely tting said arcuate housing so as to prevent any substantial. loss of pressure from said exhaust conduit, said vaned member being rotatable about `a generally horizontal axis disposed transversely with respect to said conduit, generally horizontally disposed means for conveying cobs to the lower vanes of said rotary feeder, said feeder being rotated to cause the lower vanes to advance cobs into said conduit, and a suction fan for separating husks and the like and having an intake disposed adjacent said cob conveying means and serving to prevent husks and the like coming over with the cobs from entering the rotary cob feeder.

9. A cob stacker comprising a blower having of air around said shoe to prevent husks and the like from being delivered to the stacker, means for conducting the cobs from said shoe to said blower, and means for causing said cob blower to draw in the dust laden air coming from the vicinity of said shoe.

i0. Cob stacking mechanism comprising cob receiving means including a reciprocatory cob shoe, a cob blower, a cob feeding device of the positive displacement type for directing a definite quantity of cobs into the discharge blast of said blower, and a movably mounted chute having a stepped bottom providing a substantially vertical shoulder facing toward said device for positively forcing cobs into the latter to ill the same.

11. A cob stacker comprising, in combination,

of said duct to permit the escape of husks and'' the like that are drawn into the blower, the edges of the vanes nearest the blower sloping gradually from the upper ends of the vanes to the lower wall of the duct for guiding said husks and the like over the ends of the vanes, another set of edges cooperating with the lower wall of the duct to form a trough for collecting pieces of material that tend to fall backwardly into said blower.

12. A cob stacker comprising a casing, a fan disposed in said casing, means serving as an exhaust duct leading from said casing, there being an opening in said exhaust duct, a rotary cob feeder disposed adjacent said opening and carried by said duct for delivering material into the path of the air blast from said fan, reciprocatory cob conveying means for conveying cobs toward said feeder, and means connected to be operated by said reciprocatory conveying means toward and away from said rotary cob feeder and including a stepped positively acting cob feeding member for delivering cobs from said conveyingmeans to said feeder.

13. Cob stacking mechanism comprising a cob blower, a vaned cob feeding device of the positive displacement type for directing a definite quantity of cobs into the discharge blast of said blower, a movably mounted chute having bottom and side walls and serving to direct cobs into the lower vanes of said cob feeding device, said cob feeding device including a housing with which the bottom and side walls of said cob chute telescope, and a suction fan for separating husks and the like and having an intake disposed adjacent said chute, said housing being open at the upper portion of said cob feeding device, whereby a draft of air can pass backwardly over the incoming cobs in said chute toward the intake of said suction fan.

14. Cob stacking mechanism comprising a cob blower, a cob feeding device of the positive displacement type for directing a definite quantityl of cobs into the discharge blast of said blower, and a movably mounted chute having a stepped. bottom providing a substantially vertical shoulder facing toward said device for positively forcing cobs into the latter to ll the same.

15. Cob stacking mechanism comprising cob,

receiving means including a reciprocatory cob shoe, a cob blower, a cob feeding device of the positive displacement type for directing a denite quantity of cobs into the discharge blast of said. blower, a movably mounted chute having a stepped bottom providing a substantially vertical shoulder facing toward said device for positively forcing cobs into the latter to ll the same, link means supporting the end of said chute adjacent said cob feeding device, and means supporting the other end of said chute on said reciprocatory cob shoe.

16. A cob stacker for a corn sheller having a suction fan and an intake therefor, said stacker comprising a casing, a fan disposed in said casing, means serving as an exhaust duct leading from said casing, there being an opening in said exhaust duct, a cob feeder disposed adjacent said opening and carried by said duct for delivering cobs into the path of the air blast from said fan, reciprocatory cob conveying means for conveying cobs toward said feeder, and means adjacent the intake of said suction fan for delivering cobs from said conveying means to said cob feeder.

ARTHUR B. DIE'IERICI-I. 

